pearsoh



(No Model.) 2 sheets-sheet v1.

M. H. PEARSON.

FBEDING MEGHANISM POR SEWING MAGHINES.

No. 464,480. Patented Deo. l, 1891.

MARSHALL HENRY PEA/e5 oN,

2 Sheets-Sheel 2.

(No Model.)

M. H. PEARSON. FEEDING MEGHANISM POR SEWING MACHINES.

No. 464,480. Patented Dec. 1, 1891.

o., muro-nwo., wAsHmemn, n. c.

UNITED STATES PATENT OEETCE.V

MARSHALL HENRY PEARSON, OF LEIOESTER, ENGLAND, ASSIGNOR, BY MESNEASSIGNMENTS, TO THE JOHN OELAHERTY COMPANY, OF

MONTREAL, CANADA.

FEEDING IVIECHANISIVIv FOR SEWING-MACHINS.

SPECIFICATION forming part of Letters Patent No. 464,480, dated December1, 1891.

Original application filed January 13, 1891, Serial No. 377,595. Dividedand this application tiled August 28, 1891. -Serial No.V 403,979. (Nomodel.) Patented in England June 28,1889,N0. 10,481.

To a/ZZ whom it may concern:

Be it known that I, MARSHALL HENRY PEARsON, mechanical engineer, acitizen of England, residing at Leicester, in the county of Leicesterand Kingdom of England, have invented certain new and usefulImprovements in Sewing-Machines, (for whichI have received BritishLetters Patent No. 10,481, dated June 28, 1889,) of which the followingis a specification.

This invention relates to a novel arrangement of Wax-threadsewing-machines for making whatjs known as the lock-stitch, but partsthereof are applicable to machines usinga plain or unwaxed thread. Inthis machine the awl or piercing-tool is used as a feeder, and it ismounted on the end of a lever capable of receiving a compound motion,the awl being arranged below the work While the needle is over the work.The work to be sewed is held down by the presser-foot,

Y and as the awl rises it pierces a hole, and when it has reached itshighest point it is movedl backward for feeding purposes. The shuttle,which has a reciprocating motion imparted to it through a pendulum-leverand connecting-rod through one of the grooves in the camp'late, is alsoarranged below the Work, and is so threaded that it will draw its threadprior to entering the loop instead of after- Ward, as is usual. Thepresser-foot is secured to the lower end of a round bar sliding insuitable guides in the bracket-arm, and is pressed down by a curvedspring also attached to the arm of the machine. To the arm of themachine is also fixed the wax-pot (and water-reservoir) through whichthe needle-thread in passing through it is supplied with liquid wax. Thethread-lever over which the thread passes from the bobbin to the needleis pivoted to the arm of the machine and depressed by a cam-piece xed tothe upper end of the needle-bar and returned to its normal position bymeans of a spiral or other spring. The thread-lever is also arranged todraw off the requisite amount of thread from the bobbin according to thethickness of the material operated upon. The thread led from a. bobbinon the bracket-arm passes into the Wax-pot Without any tension, so as tobe capable of receiving the greatest amount of wax before itpassesbetween the tension-plates arranged Within the pot and on leaving theWax-pot passes through an india-rubber packing in a stuffing-box.

In the drawings, Figure 1 is a front end View, partly in section; Fig.2, a rear endview;

Fig. 3, a plan view, partly in section, of the awl-lever and its supportand actuating-cam and Fig. 4. a face view of my improved machine withthe main actuating-cam removed.

A A is the main framing of the machine, cast, preferably,in one piece,and of a D form, one limb forming the base of the machine and the otherlimb the horizontal bracketarm.

B is the cam-shaft turning in bearings() b of the main framing. On thecam-shaft is keyed the aWl-cam E and the band-pulley F.

G is the oscillatin g awl-lever pivoted to the vertical rockingfulcrum-post g5, and tted with clamps g,.in which the awl g isadjustably mounted for piercing and for feeding for- Ward the Work. Y

G is the stitch regulator or cam, of circular form, so mounted upon thebase of the main framing that an arm G2 (projecting from thefulcrum-post g5, to which the oscillating lever G is connected) is madeto strike it. The oscillating lever G, which carries the awl g', ispivoted at g4 out of center to a vertical support g5, (hereinaftertermed the fulcrumpost,) and is armed at its rear end With a runner Q7,which Works in a groove eX in the cam E, as shown in Fig. 3. The runneris fixed to a pin Q14, projecting from the end o6 of the lever, and when'the end of the lever is deof the awl is effected by pivoting the leverG l to the vertical rocking fulcrurn-post g5, (which is supported bystuds g8 gg, mounted in the bearings glo g, the lower stud g9 beingcapable of adjustment by means of a set-screw 912,

TOO

mounted in the end of a lower lug gli) and causing the end of pin g1" tobe pressed by means of a spring gli against the face of a cam e, formedin the groove of the cam E, as shown at Figs. 3 and et, rIhe amount offeed and also the length of the stitch is regulated by means of theregulator or stop-piece G, mounted on a pin fixed to the main framing ofthe machine, so as to be capable of being rotated by hand, as required.On the face of the circular piece G are numbers corresponding, in thecourse of asingle revolution, with the distances between the smallest orlargest number of stitches per inch to be formedthat is to say, if thenumber of stitches vary from four to twelve or eight to sixteen stitchesper inch then the numbers 4t to l2 or 8 to 16 will be marked on itsface, as shown. Il, say, ten stitches per inch were required to besewed, then the center screw would be loosened and the index turnedround till the 1Q is opposite a pointer or marker gm, iiXed to thefra-ming of the machine, as shown in Figs. l and On the back of thecircular piece G is arranged one or more cam or cams g, decreasingrabout one-sixteenth of an inch in thickness for the largest to thesmallest number of stitches per inch to be sewed. IVhen the requirednumber on the dial is reached, the circular piece is fixed in positionby tightening the center screw. Against the face of the cam or cams g1Tthe end of alever or arm G2 (which may or may not be armed with anadjusting or correcting` screw G3) projects from the fulerum-post (5, towhich the awl-lever is pivoted, as shown in Fig. 3. By this means thetraverse of the awl and the length of the stitches may be varied asrequired. The needle is timed to follow the awl point to point until thelatter is below the Work, when the awl is returned by the meansdescribed to its normal position, the

needle meanwhile continu ing its descent to its lowest point and thenrising to form the loop in the usual manner, through which the shuttlepasses.

This application is a division of an application led by me January 13,1891, Serial No. 377,595, and all features not specifically claimedherein are reserved for said original application.

I'Iavin g th ns described my invention, what I claim isl. In asewing-machine, the combination, with a shaft B and a compound cam E, ofan awl-lever G, provided at one end with an awl and at the other endwith astud to engage the cam and adapted to rock laterally andvertically, an arm G2, and a cam g1?, to act upon the arm and therebyregulate the horizontal movement or feed of the awl-lever.

2. In a sewing-machine, the combination, with the awl-lever G and meansfor giving it the compound movement described, of a pointer secured tothe frame of the machine and a graduated cam also secured to the f rameof the machine and adapted to regulate the lateral movement of theawl-lever.

3. In combination with shaft B and cam E, awllever G, provided at oneend with an awl g and at the other end with a stud to engage the cam, arocking support g5, carrying an arm G2, and a stud g4, upon which latterthe lever rocks vertically, and a cam Q17 to act upon the arm In witnesswhereof I hereunto set my hand in the presence of two witnesses.

MARSHALL HENRY IEARSON.

lVitnesses:

JOSEPH HARVEY, Notary, Leicester.

STEPHEN PEAKE, 16 Amt Street, Leicester, Solicita/"s C'Zcrkf

